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43
R-320FK
R-320FQ
R-320FW
In the interest of user-safety the oven should be restored to its original
condition and only parts identical to those specified should be used.
WARNING TO SERVICE PERSONNEL: Microwave ovens con-
tain circuitry capable of producing very high voltage and
current, contact with following parts may result in a severe,
possibly fatal, electrical shock. (High Voltage Capacitor, High
Voltage Power Transformer, Magnetron, High Voltage Recti-
fier Assembly, High Voltage Harness etc..)
TABLE OF CONTENTS
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ...................INSIDE FRONT COVER
BEFORE SERVICING ......................................................................................................INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL................................................................................................................ 1
MICROWAVE MEASUREMENT PROCEDURE ................................................................................................... 2
FOREWORD AND WARNING............................................................................................................................... 3
PRODUCT SPECIFICATIONS .............................................................................................................................. 4
GENERAL INFORMATION................................................................................................................................... 4
OPERATION .......................................................................................................................................................... 6
TROUBLESHOOTING GUIDE ............................................................................................................................ 10
TEST PROCEDURE ............................................................................................................................................ 12
TOUCH CONTROL PANEL ................................................................................................................................. 21
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 27
PICTORIAL DIAGRAM ........................................................................................................................................ 33
POWER UNIT CIRCUIT ...................................................................................................................................... 34
CPU UNIT CIRCUIT ............................................................................................................................................ 35
PRINTED WIRING BOARD ................................................................................................................................. 36
PARTS LIST ........................................................................................................................................................37
PACKING AND ACCESSORIES ......................................................................................................................... 41
S3205R320FPW/
R-320FK
R-320FQ
R-320FW
MICROWAVE OVEN
MODELS
SERVICE MANUAL
SHARP CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
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Strany 1 - SERVICE MANUAL

43R-320FKR-320FQR-320FWIn the interest of user-safety the oven should be restored to its originalcondition and only parts identical to those specified

Strany 2 - BEFORE SERVICING

8R-320FKR-320FQR-320FWFigure O-2. Oven Schematic-Cooking ConditionSCHEMATICNOTE: CONDITION OF OVEN1. DOOR CLOSED2. COOKING TIME PROGRAMMED3. VARIABLE

Strany 3 - WARNING TO SERVICE PERSONNEL

9R-320FKR-320FQR-320FWDESCRIPTION AND FUNCTION OF COMPONENTSDOOR OPEN MECHANISMThe door is opened by pulling the door. Refer to the FigureD-1.Figure D

Strany 4

10R-320FKR-320FQR-320FWTROUBLESHOOTING GUIDENever touch any part in the circuit with your hand or an uninsulated tool while the power supply is connec

Strany 5 - SERVICE MANUAL

11R-320FKR-320FQR-320FWHome fuse or circuit breaker blowswhen power cord is plugged into wallreceptacleMonitor fuse blows when power cordis plugged in

Strany 6 - GENERAL INFORMATION

12R-320FKR-320FQR-320FWB POWER TRANSFORMER TEST1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. D

Strany 7 - OVEN DIAGRAM

13R-320FKR-320FQR-320FWTEST PROCEDURESPROCEDURELETTERCOMPONENT TEST(HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TOMEASUR

Strany 8 - OPERATION

14R-320FKR-320FQR-320FW1. Disconnect the power supply cord, and then remove outer case.2. Open the door and block it open.3. Discharge high voltage ca

Strany 9 - AH SENSOR

15R-320FKR-320FQR-320FWTEST PROCEDURESPROCEDURELETTERCOMPONENT TESTactuator is pushed by a screw driver through the lower latch hole on the front plat

Strany 10

16R-320FKR-320FQR-320FWJ KEY UNIT TESTTEST PROCEDURESPROCEDURELETTERCOMPONENT TEST2) Re-install the outer case (cabinet).3) Reconnect the power supply

Strany 11

17R-320FKR-320FQR-320FWTEST PROCEDURESPROCEDURELETTERCOMPONENT TESTclearing with a beep the key unit is faulty and must be replaced. If the control un

Strany 12 - TROUBLESHOOTING GUIDE

R-320FKR-320FQR-320FWPRECAUTIONS TO BE OBSERVED BEFORE ANDDURING SERVICING TO AVOID POSSIBLE EX-POSURE TO EXCESSIVE MICROWAVE ENERGY(a) Do not operate

Strany 13 - CK = Check / RE = Replace

18R-320FKR-320FQR-320FWTEST PROCEDURESPROCEDURELETTERCOMPONENT TESTTo protect the electronic circuits, this model is provided with a fine foil pattern

Strany 14 - TEST PROCEDURES

19R-320FKR-320FQR-320FWTEST PROCEDURESPROCEDURELETTERCOMPONENT TESTN AH SENSOR TESTChecking the initial sensor cooking conditionWARNING : The oven sho

Strany 15

20R-320FKR-320FQR-320FW(8) Reconnect the power supply cord after the outer case is installed.(9) Reconnect the oven to the power supply and check the

Strany 16

21R-320FKR-320FQR-320FWTOUCH CONTROL PANEL ASSEMBLYOUTLINE OF TOUCH CONTROL PANELThe touch control section consists of the following units.(1) Key Uni

Strany 17

22R-320FKR-320FQR-320FW1-2 P26-P27 OUT Terminal not used.3-5 P70-P72 OUT Terminal not used.6 IC IN Connected to VC.7 X2 OUTInternal clock oscillation

Strany 18

23R-320FKR-320FQR-320FW23 P114 OUT Key strobe signal.Signal applied to touch-key section. A pulse signal is input to ANI7, P100, P101, P102and P103 te

Strany 19

24R-320FKR-320FQR-320FW49 P36 OUT Signal to sound buzzer (2.0 kHz).A: key touch sound.B: Completion sound.50 P37 IN To input signal which communicates

Strany 20

25R-320FKR-320FQR-320FW(1) Structure of Absolute Humidity SensorThe absolute humidity sensor includes two thermistorsas shown in the illustration. One

Strany 21

26R-320FKR-320FQR-320FW1. Precautions for Handling Electronic ComponentsThis unit uses CMOS LSI in the integral part of thecircuits. When handling the

Strany 22 - Ω ± 5% 1/4W

27R-320FKR-320FQR-320FWTo remove the outer case, proceed as follows.1. Disconnect the power supply cord.2. Open the oven door and block it open.3. Rem

Strany 23 - TOUCH CONTROL PANEL ASSEMBLY

1R-320FKR-320FQR-320FWWARNING TO SERVICE PERSONNELMicrowave ovens contain circuitry capable of pro-ducing very high voltage and current, contact withf

Strany 24 - DESCRIPTION OF LSI

28R-320FKR-320FQR-320FWPOWER TRANSFORMER REMOVALReinstallation1. Rest transformer on the bottom plate with its primaryterminals toward the oven face p

Strany 25

29R-320FKR-320FQR-320FWCONTROL PANEL ASSEMBLY REMOVALPOSITIVE LOCK® CONNECTOR (NO-CASE TYPE) REMOVALFigure C-2. Positive lock® connector1. Disconnec

Strany 26

30R-320FKR-320FQR-320FW1.Disconnect the power supply cord and remove outer case.2. Open the door and block it open.3. Discharge high voltage capacitor

Strany 27 - Thermistors

31R-320FKR-320FQR-320FWDOOR REPLACEMENTDOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH ADJUSTMENT1. Disconnect the power supply cord

Strany 28 - TOUCH CONTROL PANEL SERVICING

32R-320FKR-320FQR-320FWchapter “Test Procedures”.).(B) An approved microwave survey meter should beused to assure compliance with proper microwaveradi

Strany 29 - WARNING FOR WIRING

33R-320FKR-320FQR-320FW645123645123ABCDEFGHABCDEFGHFigure S-1. Pictorial DiagramPOWER SUPPLY CORD 120V 60HzHIGH VOLTAGE COMPONENTSCOM.MONITORSWITCHCOM

Strany 30 - MAGNETRON REMOVAL

34R-320FKR-320FQR-320FWFigure S-2. Power Unit Circuit645123645123ABCDEFGHABCDEFGHA 1C10J21adc436T1RY1RY2DOOR SENSINGSWITCH12PIN LEAD WIREHARNESS(CN-B)

Strany 31 - COOLING FAN MOTOR REMOVAL

35R-320FKR-320FQR-320FWFigure S-3. CPU Unit Circuit645123645123ABCDEFGHABCDEFGHC-4C-2C-9C-3C-10C-1C-5C-8C-12C-11F-1 F-2 F-3G 9G10G11G12G13G14G 8 G 7 G

Strany 32 - Center of

36R-320FKR-320FQR-320FWFigure S-4. Printed Wiring Board of Power Unit645123645123ABCDEFGHABCDEFGH1DIPFSWR3SP1R2EBR1C4C2C5RY2RY1VRS1PST1RY3D6D1D4D8D2D3

Strany 33 - DOOR REPLACEMENT

37R-320FKR-320FQR-320FW****∆*∆**∆∆PARTS LISTNote: The parts marked “∆” may cause undue microwave exposure.The parts marked “*” are used in voltage mor

Strany 34 - Adhesive tape

2R-320FKR-320FQR-320FWMICROWAVE MEASUREMENT PROCEDUREA. Requirements:1) Microwave leakage limit (Power density limit): The power density of microwave

Strany 35 - Figure S-1. Pictorial Diagram

38R-320FKR-320FQR-320FWHOW TO ORDER REPLACEMENT PARTSTo have your order filled promptly and correctly, please furnish the following information.1. MOD

Strany 36 - C2 1000µ/35v

39R-320FKR-320FQR-320FW645123645123ABCDEFGHABCDEFGHOVEN AND CABINET PARTS1-144-247-24-234-254-237-37-67-87-67-86-72-14-134-174-144-24-261-127-17-51-74

Strany 37 - Figure S-3. CPU Unit Circuit

40R-320FKR-320FQR-320FW645123645123ABCDEFGHABCDEFGHCONTROL PANEL PARTSDOOR PARTSMISCELLANEOUSActual wire harness may be different from illustration.6

Strany 38

41R-320FKR-320FQR-320FWPACKING AND ACCESSORIES645123645123ABCDEFGHABCDEFGHDOOR PROTECTION SHEETSPADPA204WRE0TOP PAD ASSEMBLYFPADBA458WRKZPLASTIC BAGSS

Strany 39 - PARTS LIST

42R-320FKR-320FQR-320FW2002 SHARP CORP. (2S2.530E) Printed in U.S.ACOPYRIGHT © 2002 BY SHARP CORPORATIONALL RIGHTS RESERVED.No part of this publicatio

Strany 40

3R-320FKR-320FQR-320FWSHARP ELECTRONICS CORPORATIONSHARP PLAZA, MAHWAH,NEW JERSEY 07430-2135SERVICE MANUALMICROWAVE OVENR-320FK/ R-320FQ/ R-320FWFOREW

Strany 41 - OVEN AND CABINET PARTS

4R-320FKR-320FQR-320FWITEM DESCRIPTIONPower Requirements 120 Volts / 14.2 Amperes60 HertzSingle phase, 3 wire groundedPower Output 1200 watts (IEC TES

Strany 42 - MISCELLANEOUS

5R-320FKR-320FQR-320FWcontact a qualified electrician and have it replaced with a properlygrounded three-pronged wall receptacle or have a grounding a

Strany 43 - PACKING AND ACCESSORIES

6R-320FKR-320FQR-320FWOPERATIONDESCRIPTION OF OPERATING SEQUENCEThe following is a description of component functions duringoven operation.OFF CONDITI

Strany 44

7R-320FKR-320FQR-320FWtary cooking is determined by experiment with each foodcategory and inputted into the LSI.An example of how sensor works: (POTAT

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